\section{一个基本文档.}
\subsection{简介.}
\textbf{一个基本的文档:}
	\begin{quote}
		\textbackslash documentclass \{ \textit{argvs} \} \{ \textit{ type } \} \\
		\textbackslash usepackage \{ packages \} \\
		\textbackslash begin \{ document \} \\
			正文. \\
		\textbackslash end \{ document \} \\
	\end{quote}

%文档类型
\subsubsection{\textbf{documentclass type}}
\begin{itemize}
	\item \textbf{article}:文章
	\item \textbf{report}:报告
	\item \textbf{book}:书籍
\end{itemize}

%文档参数
\subsubsection{\textbf{documentclass argvs}}
\begin{itemize}
	\item \textbf{字号} \{ \textit{\textbf{10pt}, 11pt, 12pt} \} 
	\item \textbf{纸张尺寸} \{ \textit{\textbf{letterpaper}, a4paper} \}
	\item \textbf{标题后是否另起一页} 
				article: \textbf{notitlepage}
				report / book: \textbf{titlepage}
	\item \textbf{栏数} \{ \textit{\textbf{onecolumn}, twocolumn} \}
	\item \textbf{单面,双面}  \{
				article/report: \textbf{oneside} 
				book: \textbf{twoside} 
				\}
	\item \textbf{打印方向} \{ \textit{\textbf{landscape}} \}
	\item \textbf{open} \{
				report: \textbf{openany}
				book: \textbf{openright}
				\}
	\item \textbf{草稿模式} \{ \textit{\textbf{draft}} \}
\end{itemize}

%目录层次结构
\subsubsection{\textbf{documentclass level}}
\begin{itemize}
	\item \textbf{chapter\{...\}}: 章.
	\item \textbf{section\{...\}}: 节
	\item \textbf{subsection\{...\}}: 子节
	\item \textbf{subsubsection\{...\}}: 子子节
\end{itemize}
%\fontnote{\textit{book} 支持章. \textit{report, article} 不支持.}
